US Patent 7494300 Ice anchor

An ice anchor and method of use thereof for securing or rescuing a vehicle which has become stuck or trapped while on a frozen surface of a body of water. The ice anchor may include blades which form a shaft and fit into an opening in the ice, and plates that limit insertion of the anchor into the hole and define an attachment area for a safety device such as a rope, chain, or cable, which may include a tensioning device. When lateral force is placed on the shaft by tensioning the safety device, the outer surfaces of the blades engage the inner wall of the hole and oppose the lateral forces, allowing the vehicle to be removed from the gap or opening in the ice.